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Finding the Fourth Proportional to 18,557.76, 27,766.86 and 13,021.90

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Solution

The fourth proportional to 18,557.76, 27,766.86 and 13,021.90 is: 19,483.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,557.76 : 27,766.86 = 13,021.90 : x
  2. Step 2: Convert to fraction form
    18,557.76/27,766.86 = 13,021.90/x
  3. Step 3: Cross multiply
    18,557.76x = 27,766.86 × 13,021.90
  4. Step 4: Simplify right side
    18,557.76x = 361,577,274.23
  5. Step 5: Solve for x
    x = 361,577,274.23/18,557.76
  6. Step 6: Final answer
    x = 19,483.89

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